WO2013174878A1 - Multi-screw extruder with self-cleaning conveyor screws - Google Patents
Multi-screw extruder with self-cleaning conveyor screws Download PDFInfo
- Publication number
- WO2013174878A1 WO2013174878A1 PCT/EP2013/060536 EP2013060536W WO2013174878A1 WO 2013174878 A1 WO2013174878 A1 WO 2013174878A1 EP 2013060536 W EP2013060536 W EP 2013060536W WO 2013174878 A1 WO2013174878 A1 WO 2013174878A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- conveyor
- shafts
- comb
- shaft
- screw extruder
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
- B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
- B29B7/481—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws provided with paddles, gears or discs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
- B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/27—Cleaning; Purging; Avoiding contamination
- B29C48/2715—Cleaning; Purging; Avoiding contamination of plasticising units
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
- B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
- B29B7/482—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws provided with screw parts in addition to other mixing parts, e.g. paddles, gears, discs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
- B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
- B29B7/485—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws with three or more shafts provided with screws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
- B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
- B29B7/488—Parts, e.g. casings, sealings; Accessories, e.g. flow controlling or throttling devices
- B29B7/489—Screws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/70—Conditioning of rollers, e.g. cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/251—Design of extruder parts, e.g. by modelling based on mathematical theories or experiments
- B29C48/2511—Design of extruder parts, e.g. by modelling based on mathematical theories or experiments by modelling material flow, e.g. melt interaction with screw and barrel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/251—Design of extruder parts, e.g. by modelling based on mathematical theories or experiments
- B29C48/2517—Design of extruder parts, e.g. by modelling based on mathematical theories or experiments of intermeshing screws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
- B29C48/402—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders the screws having intermeshing parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
- B29C48/425—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders using three or more screws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
- B29C48/425—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders using three or more screws
- B29C48/43—Ring extruders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/59—Screws characterised by details of the thread, i.e. the shape of a single thread of the material-feeding screw
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/507—Screws characterised by the material or their manufacturing process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/68—Barrels or cylinders
- B29C48/683—Barrels or cylinders for more than two screws
Definitions
- the invention relates to a multi-screw extruder according to the preamble of claim 1.
- Conveying shafts are mainly based on DE 813 154 B and DE 862 668 B.
- the result was a modular system with a stripping profile formed from three circular arcs
- the task in the large-volume feed region of the product is one third and more of the total throughput volume in the inner part of the
- EP 1 423 251 B1 shows a comb width which could possibly be possible for a catchy profile.
- the object of the invention is to substantially improve the mixing-homogenizing and dispersing efficiency of a multi-screw extruder.
- the multi-screw extruder several, ie at least three, arranged in parallel, in the same direction rotating, tightly meshing conveyor shafts, which are formed at least relish marc and in each case a bore in the
- Each conveyor shaft is connected to the crest of one of its aisles
- the radial clearance is preferably at most three percent of the diameter of the bore.
- a gap is formed between the crest of one of the other gears of the at least two-speed conveyor shafts and the bore wall.
- This gap is substantially larger than the mentioned radial clearance between the at least one further comb of the conveyor shaft and the bore wall, but smaller than the flight depth of the conveyor shaft, that is smaller than the difference between the core diameter and outer diameter of the conveyor shaft.
- adjacent, intermeshing conveyor shafts are each offset by an angle such that each conveyor shaft arranged between two conveyor shafts through the gap forming ridges of the two adjacent conveyor shafts at their flanks between their crests in at least one
- Rotary position is coated with the flowable material to be processed, wherein the flanks in at least one further rotational position of the conveyor shaft by the for
- the gap between the comb and housing bore has
- conveyor shafts can also be three or four-speed
- Conveying shafts are used, so conveyor shafts with one each first comb having only a radial clearance to the housing bore and a second comb, through which said gap is formed to the housing bore.
- Conveyor shafts are offset from each other at an angle of 90 degrees.
- Conveying shafts from this position by 180 degrees takes place through the second combs of the two adjacent conveyor shafts spaced apart from the bore wall with clearance, and then the cleaning of the two flanks of the conveying shaft arranged therebetween from the flowable material.
- the conveyor shafts of the multi-screw extruder can be arranged in a plane or, for example, along a circular arc.
- the conveyor shafts in the housing along a closed circle with the same Zentriwinkelabstand
- the housing consists of an outer housing and a housing core, wherein the outer housing are provided on its inner side and the housing core on its outer side with axially parallel concave circular segments whose circle center lies in the cylindrical surface of the circle on which the axes of the conveyor shafts are located.
- the cross-sectional profile of the conveyor shafts can be made of three
- Arcs are formed, two of which correspond to the outer diameter and the cross diameter of the shaft, while the third circular arc has a diameter which is the center distance corresponds to two conveyor shafts.
- the cross-sectional profile of the conveyor shafts can also be formed from four or more circular arcs with continuously differentiated profile curves.
- the conveyor shafts can be driven by worm shafts and / or
- Kneading blocks may be formed, preferably by screw elements or kneading blocks, for example, with a
- Splines are rotatably mounted on support shafts.
- the conveyor shafts designed according to the invention can extend over the entire length of the process space of the extruder or only along part of the process space. That is, in one or more areas of the process space, the conveyor shafts may also be designed so that all their combs have only one clearance to the housing bore,
- a comb has a gap to the housing, so that account for 50% as a shear surface.
- the snail comb promotes the product, which usually rolls in front of the comb 0 with close play to the housing, on the way from gusset to gusset. Over the crest with selectable gap between the
- Housing can be either a large-volume, axial
- Process room meets through the first comb separated in the mirrored gusset area.
- the dispensing and the receiving conveyor element come to meet and form in a converging space on each side of the mutual inner wall.
- the whole product volume in the gusset area
- Circumferential direction and is easy to extend as required to the entire machine length.
- Demands on the need for effective surfaces and volumes are increasing exponentially if it is to be achieved in the product to the maximum allowable particle sizes in ⁇ - or nm size.
- success also determines the residence time of the wetted particles in the effective gap and the viscosity of the continuous phase.
- Conveying element in a rotational position of 0/360 °, 90 °, 120 ° and 270 °;
- Figure 2a shows an extruder with four in a housing in the same direction rotating double-flight, arranged along a closed circle conveyor shafts;
- FIG. 2b shows the four conveyor shafts according to FIG. 2a, shown in a plane, in a rotational position of 0/360 °, 90 °, 180 ° and 270 °;
- the profile of the conveyor shafts 1 to 3, as shown in Figure 1 for the conveyor shaft 3 is formed by a circular arc ef corresponding to the outer diameter of the conveyor shaft and a circular arc E , -F which is capped against the circular arc EF to form the gap, further each flank AB by a circular arc GH which corresponds to the core diameter and two arcs EH and GE ⁇ or FH and GF 'of the center distance between adjacent conveyor shafts, ie between the conveyor shafts, ie in the considered case between the conveyor shafts.
- Each conveyor shaft 1,2, 3 consists of a support shaft Tl, T2, T3, on the means of spline rotatably sautably sautably sautably sautarate
- Each of the two-speed conveyor shafts 1, 2, 3 has two combs, namely a first comb a, b, c, which forms a gap relative to the housing bore 1 2 3 and a second comb 0 with little clearance to the housing bore 1 ⁇ , 2 third ⁇ .
- the first comb b of the second conveyor shaft 2 is offset from the first comb of the first conveyor shaft 1 by 90 °
- the layer S 3 is formed from the flowable material to be processed.
- a layer S 2-1 in the gusset Z 1-2 formed of flowable material with the first comb a of the conveyor shaft 1 on the flank B of the conveyor shaft 2, while through the comb C of the conveyor shaft 3 at the flank A of the conveyor shaft 2, a material layer S 2-2 is formed.
- the housing bore 2 ' is coated with the material and cleaned with the comb 0.
- the comb b of the conveyor shaft 2 in the gusset Z 1-2 forms a material layer S 3 on the flank A of the conveyor shaft 1, while the comb 0 of
- the conveyor shaft 2 is coated on its flanks A, B in the one rotational position, namely the 90 0 rotational position by the gap forming first ridge a, c of the two adjacent, offset by 90 ° conveyor shafts 1, 2 with flowable material, wherein the flanks A, B of the second conveyor shaft 2 is cleaned in a rotated by 180 ° further rotational position, namely in the 270 0 rotational position of the conveyor shaft 2 by the second combs 0 of the two adjacent conveyor shafts 1, 3 of the flowable material again.
- the layer of flowable material is illustrated in the drawings by thick lines.
- the extruder 4 conveyor shafts 1, 2, 3, 4, the axes of rotation are arranged on the closed circle K.
- the double-flighted conveying elements 1 to 4 each have two combs, specifically a first comb a, b, c, d, which forms a gap relative to the housing bore 1 2 3 and 4 ', and a second comb 0 slight clearance to the housing bore 1 2 3 ⁇ , 4 ⁇ . Between the first crests a, b, c, d and the second crest 0, each conveying element 1 to 4 on both sides of the flanks A and B on.
- the first comb b of the second conveying shaft 2 is offset by 90 ° with respect to the first comb a of the first conveying shaft 1, as is the first comb c of the third conveying shaft 3 with respect to the first comb b of the second conveying shaft 2 and the first comb d of the fourth conveying shaft 4 opposite the first comb c of the third conveyor shaft 3.
- flanks A, B in a rotated by 180 ° rotational position (180 ° rotational position of the shaft 3 or 270 ° - rotational position of the shaft 2) by the second combs 0 of the two adjacent conveyor shafts 2, 4 and 1, third be cleaned from the flowable material again.
- the outer housing Gl is on the inside and the housing core G-2 on its outside with provided axially parallel concave circle segments, the circle centers lie in the cylinder on which the axes of the conveyor shafts are 1 to 12.
- each affords exactly conveyor element 1 to 12 two combs, namely a first comb a, b, c, d, which forms a gap relative to the housing bore and a second comb 0 with little play to
- Housing core G-2 are formed, between which the respective conveyor shaft 1 to 12 is mounted.
- the first comb b of the second conveyor shaft 2 is offset by 90 ° with respect to the first comb of the first conveyor shaft 1, likewise the first comb c, the third conveyor shaft 3 with respect to the first comb b of the second conveyor shaft 2 and the first comb d of the fourth conveying shaft 4 with respect to the first comb c of the third conveying shaft 3, etc.
- the conveying waves as shown for the shaft 3, have a cross-sectional profile which consists of the circular arcs E-F, E'-F H-G and E-H,
- the circular arc EF and E'-F ' runs parallel to the bore wall 3 ⁇ .
- the circular arc HG has a diameter corresponding to the core diameter
- the circular arc EF thus corresponds to the outer diameter of the shaft, while the circular arc E -F is capped to form the gap with respect to the circular arc EF.
- the cross-sectional profile can also be continuous with four or more circular arcs
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Algebra (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015513161A JP6109300B2 (en) | 2012-05-23 | 2013-05-22 | Multi shaft extruder |
EP13731696.4A EP2852485B1 (en) | 2012-05-23 | 2013-05-22 | Multi-screw extruder with self-cleaning conveyor screws |
RU2014146665A RU2618565C2 (en) | 2012-05-23 | 2013-05-22 | Multi-roll extruder with self-cleaning furnish rolls |
KR1020147036216A KR101715461B1 (en) | 2012-05-23 | 2013-05-22 | Multi-screw extruder with self-cleaning conveyor screws |
CN201380026242.1A CN104540658B (en) | 2012-05-23 | 2013-05-22 | Multiscrew extrusion machine with automatically cleaning conveyor screw |
BR112014028953-0A BR112014028953B1 (en) | 2012-05-23 | 2013-05-22 | multi-axis extruder |
ES13731696.4T ES2632264T3 (en) | 2012-05-23 | 2013-05-22 | Multi-spindle extruder with self-cleaning conveyor spindles |
IN9720DEN2014 IN2014DN09720A (en) | 2012-05-23 | 2014-11-18 | |
US14/550,299 US10414081B2 (en) | 2012-05-23 | 2014-11-21 | Multi-shaft extruder |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA608/2012A AT512974B1 (en) | 2012-05-23 | 2012-05-23 | Multi-screw extruder |
ATA608/2012 | 2012-05-23 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP (1) | EP2852485B1 (en) |
JP (1) | JP6109300B2 (en) |
KR (1) | KR101715461B1 (en) |
CN (1) | CN104540658B (en) |
AT (1) | AT512974B1 (en) |
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CN103665429A (en) * | 2013-12-26 | 2014-03-26 | 中胶橡胶资源再生(青岛)有限公司 | Desulphuration and regeneration equipment for waste rubber powder |
CN103935013A (en) * | 2014-03-28 | 2014-07-23 | 许汉辰 | Four-screw mixing extruder |
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DE202015104765U1 (en) | 2015-09-08 | 2016-01-12 | Blach Verwaltungs GmbH + Co. KG | Plant for the continuous preparation of rubber compounds with barrel press |
DE102015120586B4 (en) | 2015-09-08 | 2018-10-18 | Blach Verwaltungs Gmbh & Co. Kg | Ring extruder for the continuous preparation of rubber material with co-extruder, system and process for preprocessing a continuously processed rubber material |
DE202015104764U1 (en) | 2015-09-08 | 2016-01-12 | Blach Verwaltungs GmbH + Co. KG | Ring extruder for continuous preparation of rubber compounds with co-extruder |
DE202015106285U1 (en) | 2015-11-18 | 2016-01-11 | Blach Verwaltungs Gmbh & Co. Kg | Ring extruder for the continuous preparation of rubber compounds with co-extruder and cooling system |
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Also Published As
Publication number | Publication date |
---|---|
IN2014DN09720A (en) | 2015-07-31 |
ES2632264T3 (en) | 2017-09-12 |
JP6109300B2 (en) | 2017-04-05 |
US20150138909A1 (en) | 2015-05-21 |
BR112014028953A2 (en) | 2017-11-14 |
KR101715461B1 (en) | 2017-03-13 |
CN104540658A (en) | 2015-04-22 |
AT512974B1 (en) | 2015-02-15 |
KR20150023471A (en) | 2015-03-05 |
JP2015523237A (en) | 2015-08-13 |
AT512974A1 (en) | 2013-12-15 |
BR112014028953B1 (en) | 2020-11-24 |
EP2852485A1 (en) | 2015-04-01 |
EP2852485B1 (en) | 2017-04-05 |
RU2014146665A (en) | 2016-07-20 |
US10414081B2 (en) | 2019-09-17 |
RU2618565C2 (en) | 2017-05-04 |
CN104540658B (en) | 2019-01-11 |
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